NORMAN, Okla. -- Oklahoma earned a record 34th 10-win season, a share of its 44th conference championship and a berth in the AT&T Cotton Bowl during its 2012 regular season.
 
From thrilling, last-second scores to big defensive turnovers and stops, what are the plays that stood out most to you this season for the Sooners? We're asking fans to rank the 10 biggest on both sides of the ball.
 
 
First, we start with 10 memorable plays by the defense including three interceptions, two sacks, two forced fumbles, two critical fourth-down stops and a Red River safety. We present them here in the order they happened as the season unfolded. Refresh your memory by watching all 10 and then make your vote!
 
  Colvin INT at Texas Tech

On October 6, Oklahoma played on a field that had not been kind to the Sooners in the past few trips to Lubbock. Late in the second quarter, OU had the early lead, 21-13, but the Red Raiders were driving. On 2nd-and-7 from midfield, junior corner Aaron Colvin made a perfect read on Tech QB Seth Doege, timed his leap and snatched his first career interception from the air. The pick broke momentum for Tech and set up a field goal to extend OU's lead right before the half:
 

 
  Harris INT at Texas Tech

OU's defense frustrated the Red Raiders' high-powered offense for much of the game and senior safety Javon Harris added to its misery midway through the third quarter. With OU in front, 31-13, Colvin tipped Seth Doege's pass over the middle and Harris was in position to haul in the ball. Forty-six yards later, Harris was celebrating in the end zone and Oklahoma never looked back in the 41-13 win:
 

 
  Colvin INT vs. Texas

After notching his first career interception against Tech, Colvin wasted no time getting his hands on his second INT just a week later against archrival Texas in the Cotton Bowl. Already trailing, 27-2, in the second quarter, Longhorns' QB David Ash had Tom Wort bearing down from his right. Ash launched the ball 35 yards downfield but Colvin slid in front of senior Texas receiver Marquise Goodwin and made a spectacular, leaping INT:
 

 
  Red River Safety vs. Texas

Oklahoma's defense continued its mastery of Texas later in the second quarter, putting an emphatic exclamation mark on the performance with a safety right in front of the Longhorn fans in the Cotton Bowl. Set up by a masterful punt from senior Tress Way (and downed on the one-yard-line by Justin Brown), Texas attempted to run to the left out of the end zone behind four offensive linemen. The Sooners didn't budge and linebacker Jaydan Bird had first contact for the safety:
 

 
  Wort Forced Fumble vs. Kansas

Kansas quarterback Dayne Crist may still have trouble sleeping at night with visions of the missile that Tom Wort deployed on this play. Late in the first quarter with the Jayhawks threatening on the Sooners' 12-yard-line, pressure from end Chuka Ndulue forces Crist out of the pocket. Wort, sensing his chance, jets 11 yards to detonate Crist and force the fumble. Casey Walker scoops up the ball and rumbles down the field as the capacity crown in Norman goes wild:
 

 
  Favors Sack vs. Kansas

With Oklahoma looking to lock up its third-consecutive win, sophomore defensive end Rashod Favors recorded his second career sack to force Kansas into second-and-18. The sack set up Javon Harris' second interception of the game on third down and the Sooners went on to a 52-7 victory:
 

 
  Fourth-Down Stop vs. West Virginia

Oklahoma's first-ever trip to Morgantown was a shootout, but it was this defensive play that made the difference. West Virginia had scored touchdowns on two consecutive possessions and appeared to be driving for three in a row. Facing fourth-and-1 from OU's 15-yard line, Mountaineer running back Andrew Buie was stuffed a yard behind the line-of-scrimmage by Stacy McGee and Javon Harris as the Sooners took the ball back with a 38-30 lead. The stop proved critical as OU went on to win, 50-49, on a touchdown pass from Landry Jones to Kenny Stills with 24 seconds remaining:
 

 
  Washington Sack & Strip at TCU

With Oklahoma clinging to a 21-14 lead in the third quarter of its regular-season finale, senior defensive end and Fort Worth native R.J. Washington hit TCU quarterback Trevone Boykin from behind and jarred the ball loose as Frank Shannon recovered. The ruling on the field was an incomplete pass, but after review, the officials determined it was a fumble and Oklahoma took over on TCU's 40-yard line. The Sooners capitalized, adding a field goal to make it a two-possession game:
 

 
  Jefferson Saves TD at TCU

Taking over at OU's 31-yard line and trailing 24-14 in the fourth quarter, TCU elected to take a shot at the end zone on the very first play of the drive. TCU QB Trevone Boykin appeared to have Josh Boyce open over the middle before Sooner safety Tony Jefferson leapt up and deflected the hopeful touchdown. TCU had to settle for a field goal, resulting in the final score of 24-17:
 

 
  Secondary Helps Clinch Win at TCU

With the Big 12 title on the line, the Oklahoma defense needed just one more stop. Trailing 24-17, TCU had driven 60 yards to the OU 15-yard line, but only had one last hope on fourth-and-13. TCU quarterback Trevone Boykin threw it up for Josh Boyce in the end zone, but the Sooner secondary duo of Julian Wilson and Tony Jefferson combined on the coverage to disrupt the catch. The Sooners took over, took a knee to run out the clock and celebrated their eighth Big 12 championship: